Description
Assign a timestamp to complementary chronological splits.
Model validation depends on when information became available and how records or entities enter splits. A timestamp inequality or group overlap count can identify one local issue without proving absence of every form of leakage.
Assign a timestamp to complementary chronological splits.
When to use this tool
Use Data Split Chronological Cutoff Membership when checking an explicit feature-time or split-membership condition.
How to use the tool and how it works
- Enter timestamp, cutoff, equalInTraining. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read training, validation. Inspect training, validation before interpreting the associated values.
Assign a timestamp to complementary chronological splits. equalInTraining chooses training <= cutoff and validation > cutoff, otherwise training < cutoff and validation >= cutoff.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| timestamp | Timestamp | Required. Finite number. |
| cutoff | Cutoff | Required. Finite number. |
| equalInTraining | Equal In Training | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| training | Training | Required. Boolean. |
| validation | Validation | Required. Boolean. |
{
"input": {
"timestamp": 10,
"cutoff": 10,
"equalInTraining": true
},
"output": {
"training": true,
"validation": false
}
}Limitations and assumptions
- This single-point partition does not inspect labels, entities, leakage or complete split representativeness.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a complete data-provenance and validation-design review, including label horizons, entity dependence and preprocessing fit scope.
References
Similar or alternative tools
- Fold Group Membership Bit
Check literal membership of a group in a supplied fold-group list.
- Split Entity Support Gap
Compare distinct entity support across two split labels.